Modern image format
Detects use of modern formats like WebP and AVIF.
Pourquoi est-ce important ?
WebP is on average 25-35% smaller than JPEG at equal quality. AVIF is even more efficient. Modern formats reduce page weight, speed up load time and improve Core Web Vitals scores.
Comment le corriger ?
Convert JPEG/PNG images to WebP or AVIF. Use <picture> with multiple sources as fallback for older browsers. Tools like Squoosh, ImageOptim or Sharp (Node.js) do this automatically.
Ce check note de 0 à 100. Sous 50 c’est un échec, 50 à 89 un avertissement, 90 ou plus c’est bon. Après chaque crawl vous voyez la note par page dans le rapport, avec une courte explication.
Questions fréquentes
Detects use of modern formats like WebP and AVIF.
WebP is on average 25-35% smaller than JPEG at equal quality. AVIF is even more efficient. Modern formats reduce page weight, speed up load time and improve Core Web Vitals scores.
Convert JPEG/PNG images to WebP or AVIF. Use <picture> with multiple sources as fallback for older browsers. Tools like Squoosh, ImageOptim or Sharp (Node.js) do this automatically.
Exemple
Copiez le code ci-dessous et adaptez le nom de domaine, la marque et le contenu à votre situation.
<picture> <source srcset="hero.avif" type="image/avif"> <source srcset="hero.webp" type="image/webp"> <img src="hero.jpg" alt="Hero"> </picture>